/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Called to notify the system view model that one of the object references in the system was modified.
void NotifyObjectAssetChanged ( [UNiagaraNode](API\Plugins\NiagaraEditor\UNiagaraNode) & OwningNode, [FName](API\Runtime\Core\UObject\FName) VariableReadName, [UObject](API\Runtime\CoreUObject\UObject\UObject) * NewValue )